A viewer-presence sensor unit for controlling operation of a television set. The sensor unit first includes a detector for sensing presence of a living being near the television set and a timer for measuring the amount of time of non-presence of a living being. Second, the sensor unit incorporates a...http://www.google.com/patents/US6259486?utm_source=gb-gplus-sharePatent US6259486 - Sensor unit for controlling television set operation
